We direct trade with a grower from china. Pesonally, our relationship with the grower was already developed once we even open our doors.
I met these guys at an event in Denver. They have a pretty extensive sourcing process. I usually hate single serve coffee, but wow! their's is amazing because they control the beans all the way from the tree. I'd check them out, maybe they have some advice. https://www.dripjoy.com/
As someone who has travelled latin america alot ...........and speaks the language. That area of the world is fraught with problems. Mostly with transparency. The coffee associations will help you but English may be limited. Bringing less than 1/2 a container is uneconomical IMO. then again, you would have to be able to use or sell that amount of coffee